<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>嵌套列表</title>
</head>

<body>
    <h4>一个嵌套列表：</h4>
    <ul>
        <li>咖啡</li>
        <li>茶
            <ul>
                <li>红茶</li>
                <li>绿茶</li>
            </ul>
        </li>
        <li>牛奶</li>
    </ul>
</body>

</html>